must look
Verbo regular: look - looked- looked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must look
you must look
she must look
we must look
you must look
they must look 	I must be looking
you must be looking
she must be looking
we must be looking
you must be looking
they must be looking	I must have looked
you must have looked
she must have looked
we must have looked
you must have looked
they must have looked	I must have been looking
you must have been looking
she must have been looking
we must have been looking
you must have been looking
they must have been looking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not look
you must not look
she must not look
we must not look
you must not look
they must not look 	I must not be looking
you must not be looking
she must not be looking
we must not be looking
you must not be looking
they must not be looking	I must not have looked
you must not have looked
she must not have looked
we must not have looked
you must not have looked
they must not have looked	I must not have been looking
you must not have been looking
she must not have been looking
we must not have been looking
you must not have been looking
they must not have been looking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I look?
must you look?
must she look?
must we look?
must you look?
must they look? 	must I be looking?
must you be looking?
must she be looking?
must we be looking?
must you be looking?
must they be looking? 	must I have looked?
must you have looked?
must she have looked?
must we have looked?
must you have looked?
must they have looked? 	must I have been looking?
must you have been looking?
must she have been looking?
must we have been looking?
must you have been looking?
must they have been looking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not look?
must you not look?
must she not look?
must we not look?
must you not look?
must they not look? 	must I not be looking?
must you not be looking?
must she not be looking?
must we not be looking?
must you not be looking?
must they not be looking? 	must I not have looked?
must you not have looked?
must she not have looked?
must we not have looked?
must you not have looked?
must they not have looked? 	must I not have been looking?
must you not have been looking?
must she not have been looking?
must we not have been looking?
must you not have been looking?
must they not have been looking?